it emits light that bounces of a mirror that is attached directly to the driver/membrane of a speaker this then reflected perpendicular to the ground (up the tube) and is then split into a circle by a spinning motor with a mirror attached to it.

also the mini screen can be removed to project the laser on wall, but it doesnt work well since intensity is lost over distance

hello looking cool dude, may i sugest two motors one 90 degrees to the other like mine, it will give more responsiveness and less distortion in the image. speakers tend to have some bias distortion but this statement is my own opinion.